664024226 has 4 divisors (see below), whose sum is σ = 996036342. Its totient is φ = 332012112.

The previous prime is 664024183. The next prime is 664024243. The reversal of 664024226 is 622420466.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 416119201 + 247905025 = 20399^2 + 15745^2 .

It is a junction number, because it is equal to n+sod(n) for n = 664024192 and 664024201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 166006055 + ... + 166006058.

Almost surely, 2^664024226 is an apocalyptic number.

664024226 is a deficient number, since it is larger than the sum of its proper divisors (332012116).

664024226 is a wasteful number, since it uses less digits than its factorization.

664024226 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332012115.

The product of its (nonzero) digits is 27648, while the sum is 32.

The square root of 664024226 is about 25768.6675247286. The cubic root of 664024226 is about 872.4247441543.

The spelling of 664024226 in words is "six hundred sixty-four million, twenty-four thousand, two hundred twenty-six".